FAIR VALUE OF FINANCIAL INSTRUMENTS (Carrying Amount and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial assets:
Debt securities available for sale	$ 603,168	$ 266,096
Securities held to maturity	2,074	2,827
Other investments
Other Investments	11,998	11,597
Financial liabilities:
Noninterest-bearing demand deposits	2,803,823	1,726,135
Carrying Amount
Financial assets:
Cash and due from banks	32,660	8,692
Overnight deposits	1,824,820	855,613
Debt securities available for sale	603,168	266,096
Securities held to maturity	2,017	2,760
Equity investments	2,289	2,313
Loans, net	3,565,167	3,101,646
Other investments
FRB Stock	7,430	7,381
FHLB Stock	3,070	2,718
Disability Fund	1,000	1,000
Time deposits at banks	498
CRA - CD		498
Accrued interest receivable	13,504	13,249
Financial liabilities:
Noninterest-bearing demand deposits	2,803,823	1,726,135
Money market and savings deposits	2,571,707	2,011,409
Time deposits	82,039	92,062
Trust preferred securities payable	20,620	20,620
Subordinated debt, net of issuance cost	24,698	24,657
Accrued interest payable	448	712
Secured Borrowings	35,559	36,964
Total Fair Value
Financial assets:
Cash and due from banks	32,660	8,692
Overnight deposits	1,824,820	855,613
Debt securities available for sale	603,168	266,096
Securities held to maturity	2,074	2,827
Equity investments	2,289	2,313
Loans, net	3,592,347	3,094,998
Other investments
Disability Fund	1,000	1,000
Time deposits at banks	498
CRA - CD		498
Accrued interest receivable	13,504	13,429
Financial liabilities:
Noninterest-bearing demand deposits	2,803,823	1,726,135
Money market and savings deposits	2,571,707	2,011,409
Time deposits	82,610	93,157
Trust preferred securities payable	20,002	20,011
Subordinated debt, net of issuance cost	25,438	25,375
Accrued interest payable	448	712
Secured Borrowings	35,559	36,964
Interest Rate Cap | Carrying Amount
Other investments
Derivative Asset	2,086
Interest rate cap derivative		770
Interest Rate Cap | Total Fair Value
Other investments
Derivative Asset	2,086
Interest rate cap derivative		770
Fair Value, Inputs, Level 1
Financial assets:
Cash and due from banks	32,660	8,692
Overnight deposits	1,824,820	855,613
Equity investments	2,289	2,313
Other investments
Time deposits at banks	498
CRA - CD		498
Financial liabilities:
Noninterest-bearing demand deposits	2,803,823	1,726,135
Money market and savings deposits	2,571,707	2,011,409
Accrued interest payable	3	7
Secured Borrowings	0
Fair Value, Inputs, Level 2
Financial assets:
Debt securities available for sale	603,168	266,096
Securities held to maturity	2,074	2,827
Other investments
Disability Fund	1,000	1,000
Accrued interest receivable	717	414
Financial liabilities:
Time deposits	82,610	93,157
Subordinated debt, net of issuance cost	25,438	25,375
Accrued interest payable	337	591
Secured Borrowings	35,559	36,964
Fair Value, Inputs, Level 2 | Interest Rate Cap
Other investments
Derivative Asset	2,086
Interest rate cap derivative		770
Fair Value, Inputs, Level 3
Financial assets:
Loans, net	3,592,347	3,094,998
Other investments
Accrued interest receivable	12,787	12,835
Financial liabilities:
Trust preferred securities payable	20,002	20,011
Accrued interest payable	108	$ 114
Secured Borrowings	$ 0